The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 21, 2018
Filed:
Jun. 09, 2016
Applicant:
Brugg Rohr Ag Holding, Brugg, CH;
Inventors:
Joern Homann, Hannover, DE;
Stephan Peters, Wunstorf, DE;
Assignee:
BRUGG ROHR AG HOLDING, Brugg, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L 9/14 (2006.01); F16L 59/14 (2006.01); B32B 5/18 (2006.01); B32B 7/12 (2006.01); B32B 27/08 (2006.01); B32B 27/36 (2006.01); B32B 27/40 (2006.01); B32B 1/08 (2006.01); F16L 9/12 (2006.01); B32B 27/06 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01); F16L 11/04 (2006.01);
U.S. Cl.
CPC ...
F16L 59/143 (2013.01); B32B 1/08 (2013.01); B32B 5/18 (2013.01); B32B 7/12 (2013.01); B32B 27/065 (2013.01); B32B 27/08 (2013.01); B32B 27/306 (2013.01); B32B 27/32 (2013.01); B32B 27/36 (2013.01); B32B 27/40 (2013.01); F16L 9/121 (2013.01); B32B 2266/0264 (2013.01); B32B 2266/0278 (2013.01); B32B 2266/08 (2013.01); B32B 2307/304 (2013.01); B32B 2307/554 (2013.01); B32B 2307/72 (2013.01); B32B 2307/724 (2013.01); B32B 2307/732 (2013.01); B32B 2597/00 (2013.01); F16L 2011/047 (2013.01);
Abstract
A double-wall pipe includes a media-conveying inner tube, and a multilayer plastics outer tube with a gas permeation barrier layer. The plastics outer tube includes a significant proportion of polyethylene (PE). The gas permeation barrier layer consists of a compact extruded polyethylene terephthalate (PET) layer having a material thickness of from 0.8 mm to 2 mm or comprises a closed-cell foam made from PET having a material thickness of between 10 mm and 100 mm. A heat insulating layer is arranged in an annular gap between the inner tube and the plastics outer tube.